1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040523dca803a67c983d06513dc05c132e11d62c730eb7acb40ff18ac65134cc. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/244c2878-bc4e-490a-bb64-98e68ea20d30.json and https://artists.proofprofile.net/proofs/artist/244c2878-bc4e-490a-bb64-98e68ea20d30.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf4bd90fa984b0caba1ea2d4551c0677e7f526d6a36a7981b64101da7cd441a. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEQ2224660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1059624d90fac7141f9be7f65917eb8065d9e225a717e52515e61cf075ad69fc. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEQ2248735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e62e1c40c1fa5cf22ce77d77e26244ec8c5742af6ef4e28077e17d53cec5cd9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMER2297006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e017768dd715203055c14ad8ee1f9f27e8aa07eca0c8b3b85368ef5d8652560. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB42201805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909ab391bdf7d51a27dbb272c9aeb8f938787833e0f8fbfaf4bd83148e39e68d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN82300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765427f8e65635c54b194a08d055998ca502b2136841c7af25cc16c8ef19d333. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6H2366896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd112e1f1f0a4228fd1be9df874b7ed669d8f550f59f51ffb4059f7027b4be9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEQ2385923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafb3532b62efc1610f4fbf7e656baa1fe382ce78faaa48aa6a017e18ddc8681. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWY2312668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9505d1ffa4c8924be40f1f2796c4b3f9f07a3a0cc227c400093739c83597fe2. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWY2312670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e14f8cf62fc6f0a2faad96ee123bd8870b112de1ee2b3f6fb813c6a8bd53a7e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFL2398439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b727fd54f599ba701ee7d59902d22dbb27f4049f05f01e293a19624894e78e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN32403436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8644541c2dc27d1ba61d5a479393cd88d1f1fb26010916d2786e2ee7b9066192. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN42406440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d559a594ba21d9526fe419963d4ac558aace89280136928409e3649352041d1. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNB2400741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9f684d5c39d610ef2b37c92c4dd111a7e581b2e63bf908cd3134b5d3d91dc4. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6P2471068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7472dc8b8276bc6466bf3e06c69ffc1a8f273169c7011ade21770ffb5f1648. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6G2496201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ef9b47591cc6ef186c141c0ccb232ae76a2e1a1c137dddc986aab7fe5a80e3. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZMEP2450096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960a70f7882e12b062f709e0500cbdfa7fb405f65c23c6553eb6e5c944d159ec. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZRP42464102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x207ffe91c6cb00d92c60b52bb5f8c865983733bc55ead348022282ce9b683439. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB22427655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90962c20088059fad7759357034a8be3e956fa478adbc1ef5a2d8dda922a74a2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB22452376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b169c1a4f211008d382da9fa906a92855fa5d99c7100d32b84baa4a6ba8e88. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFK2484104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c19ada567e65aacfc2ffcf9455753518762a983ad764048cd14fadd86db4a1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFN2433691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1d5d876135c6104dce5802b7b7f0a80b9bba0f10a194067901609601b030a5. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ782472487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91de864426a065dd1591fbb7c69aa8e61a74a16164946d6b348db37aab6687b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA62539219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26babe3cc5e82a1979fe4eadb13ca0f088dd248bdbc047bf0fbc3074a09aa5a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN32555647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec16b27c345ffc57f6a67f36a7bc666d73d72d80584f98bf25482bff276f7e1d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN42507578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8df81073c31ea825764cdc44e2a52626405111f8de734cb7a3dd673db338d66. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNB2544914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889f326a282467ec70c50ee5bbd092a0ca7f87790654dec3350637a6317a57bb. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q2583314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262b64768ca5f0caf52868bc728396c62e53f10ba22edd0b43c84eb549f21b59. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6H2534181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6846cd31b0323731d4a68e664dbc09b87c81352232932adec9057df13b2a3bf9. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFK2595237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889cccccdded9a3b225fc85372a3929d397b471750009094866a1e5f472f589f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFM2549166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5d5002031bed093fcf21fd676129c69a2af1ee2f3ab98807e1970afc70bd88. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFW2540790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32fa5e9d25fb6f5b8edf285d9f6f6899e50e8395235a5570bf1adbdd84526134. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZWFW2538689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297d5b47a7a774f38e3e27de1ab2e2c5fe5a6d044275d6642d7d53a3226f5a03. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ782500256.